The Collaborative International Dictionary of English v.0.48:

Recorder \Re*cord"er\ (r?*k?rd"?r), n.
   1. One who records; specifically, a person whose official
      duty it is to make a record of writings or transactions.
      [1913 Webster]

   2. The title of the chief judical officer of some cities and
      boroughs; also, of the chief justice of an East Indian
      settlement. The Recorder of London is judge of the Lord
      Mayor's Court, and one of the commissioners of the Central
      Criminal Court.
      [1913 Webster]

   3. (Mus.) A kind of wind instrument resembling the flageolet.
      [Obs.] "Flutes and soft recorders." --Milton.
      [1913 Webster]

WordNet (r) 3.0 (2006):

recorder
    n 1: equipment for making records [syn: recorder, recording
         equipment, recording machine]
    2: someone responsible for keeping records [syn: registrar,
       record-keeper, recorder]
    3: a barrister or solicitor who serves as part-time judge in
       towns or boroughs
    4: a tubular wind instrument with 8 finger holes and a fipple
       mouthpiece [syn: fipple flute, fipple pipe, recorder,
       vertical flute]